[COMPATIBILITY]:Cat fountain filter replacement, Compatible DownyPaws pet water fountain DPWFP6 battery powered wireless cat water fountain. [IN THE BOX] :This cat water fountain filter includes a 6-pack of replacement filters and a 6-pack of replacement pre-filter sponges. [FILTER SYSTEM] The pet fountain replacement filter comes with a multi-layer filtration system. Non-woven fabric filters out hair and impurities; activated carbon removes odors and tastes and purifies the water; filter stone removes heavy metals; ion-exchange resin softens the tap water and improves taste; and a high-density pre-filter sponge helps to filter out fine impurities and prevents them from getting into the pump, which helps to prolong the life of the pump. [Change Filters Regularly] Please change your cat water fountain filters replacement and sponges every two weeks; if you have multiple pets, clean your cat fountain and change your pet water fountain filters more frequently. [Tip] Before using the pet water fountain filter replacement, please soak the cat water fountain filter for 5 minutes and rinse thoroughly for 30 seconds, this will prevent carbon dust from dislodging into the water and keep the water clean. Cat Water Fountain Filter, Pet Fountain Filters Compatible with DownyPaws 84 oz/2.5 L Battery Powered Wireless Pet Water Fountain, Cat Fountain Filter Replacement